| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.jackrabbit.oak.plugins.document.bundlor; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.concurrent.Executor; |
| |
| import com.google.common.collect.Iterables; |
| import org.apache.jackrabbit.oak.api.CommitFailedException; |
| import org.apache.jackrabbit.oak.commons.PathUtils; |
| import org.apache.jackrabbit.oak.spi.commit.BackgroundObserver; |
| import org.apache.jackrabbit.oak.spi.commit.BackgroundObserverMBean; |
| import org.apache.jackrabbit.oak.spi.commit.CommitInfo; |
| import org.apache.jackrabbit.oak.spi.commit.DefaultEditor; |
| import org.apache.jackrabbit.oak.spi.commit.Editor; |
| import org.apache.jackrabbit.oak.spi.commit.EditorDiff; |
| import org.apache.jackrabbit.oak.spi.commit.Observable; |
| import org.apache.jackrabbit.oak.spi.commit.Observer; |
| import org.apache.jackrabbit.oak.spi.commit.SubtreeEditor; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.apache.jackrabbit.oak.plugins.memory.EmptyNodeState.EMPTY_NODE; |
| |
| public class BundlingConfigHandler implements Observer, Closeable { |
| public static final String DOCUMENT_NODE_STORE = "rep:documentStore"; |
| public static final String BUNDLOR = "bundlor"; |
| |
| public static final String CONFIG_PATH = "/jcr:system/rep:documentStore/bundlor"; |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| private NodeState root = EMPTY_NODE; |
| private BackgroundObserver backgroundObserver; |
| private Closeable observerRegistration; |
| private boolean enabled; |
| |
| private volatile BundledTypesRegistry registry = BundledTypesRegistry.NOOP; |
| |
| private Editor changeDetector = new SubtreeEditor(new DefaultEditor() { |
| @Override |
| public void leave(NodeState before, NodeState after) throws CommitFailedException { |
| recreateRegistry(after); |
| } |
| }, Iterables.toArray(PathUtils.elements(CONFIG_PATH), String.class)); |
| |
| @Override |
| public synchronized void contentChanged(@NotNull NodeState root, @NotNull CommitInfo info) { |
| EditorDiff.process(changeDetector, this.root, root); |
| this.root = root; |
| } |
| |
| public BundlingHandler newBundlingHandler() { |
| return new BundlingHandler(registry); |
| } |
| |
| public void initialize(Observable nodeStore, Executor executor) { |
| registerObserver(nodeStore, executor); |
| //If bundling is disabled then initialize would not be invoked |
| //NOOP registry would get used effectively disabling bundling for |
| //new nodes |
| enabled = true; |
| log.info("Bundling of nodes enabled"); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| unregisterObserver(); |
| } |
| |
| public BackgroundObserverMBean getMBean(){ |
| return checkNotNull(backgroundObserver).getMBean(); |
| } |
| |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| BundledTypesRegistry getRegistry() { |
| return registry; |
| } |
| |
| private void recreateRegistry(NodeState nodeState) { |
| //TODO Any sanity checks |
| registry = BundledTypesRegistry.from(nodeState); |
| log.info("Refreshing the BundledTypesRegistry"); |
| } |
| |
| private void registerObserver(Observable observable, Executor executor) { |
| backgroundObserver = new BackgroundObserver(this, executor, 5); |
| observerRegistration = observable.addObserver(backgroundObserver); |
| } |
| |
| public void unregisterObserver() throws IOException { |
| if (backgroundObserver != null) { |
| observerRegistration.close(); |
| backgroundObserver.close(); |
| |
| observerRegistration = null; |
| backgroundObserver = null; |
| } |
| } |
| |
| } |
| |
| |